TM 5-3820-256-10
(2)
Auxiliary drum. To spool cable onto and off the auxiliary drum, operate the the clutch control (2) and the
auxiliary drum brake (6) like the steps detailed for the hoist drum, above. Instead of moving the kelly up and
down the mast, you will move the auxiliary drum traveling blocks. Move the clutch control (2) to the center
position and immediately reset the brake (6) when finished.
(3)
Third drum. To spool cable onto the third drum, pull back on the clutch control (3) while releasing the brake
(4). Release clutch (2) and reset brake (4) to stop. To spool cable off the drum, release the brakes and allow
the necessary cable to spool off the drum. Then reset the brakes.
b. Rotary table.
(1)
Position the rotary table transmission control (3, figure 2-8) in the desired gear range.
(2)
To begin rotation, move the table rotation control (2) to the left for counterclockwise rotation or to the right for
clockwise rotation. Control the table's speed by moving the handle more or less in the desired direction. Stop
rotation by returning control (2) to center (N) position.
c. Mud system.
(1) Mud pits.
(a)
Be sure discharge piping hose is connected to the mud pump outlet. Be sure the overflow pipe in the mud
pump primary pit is lined up with the rotary table hole.
(b)
Install the gasket (see figure 2-26) over the drive sleeve and then place the sleeve in the overflow pipe on
the primary pit.
(c)
Operate the hoist drum to lower the kelly through the rotary table. Attach the drive plate to the kelly.
Lower the plate onto the drive sleeve. Operate the rotary table counterclockwise slowly to rotate the drive
plate and screw the drive sleeve into the ground until the flange seals against the bottom of the pit.
(d)
Retract the kelly and remove the drive plate.
(2) Mud pump.
NOTE
Before operation, be sure that all mud pump suction and discharge
connections have been made and drill string is in the drilling position (in
the hole or ready to start drilling the hole). Do not operate the pump with
the kelly retracted in the mast.
(a)
Prime the mud pump by removing the suction valve covers and filling the fluid end completely with water.
Reinstall the valve covers.
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